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┃ FLIGHT CREW OPERATING MANUAL ┃ ┃ ┃ ┃
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NON PRECISION APPROACH MODE
This mode guides the aircraft laterally and vertically down to the Minimum Descent Altitude
(MDA) or Minimum Descent Height (MDH) along the final descent profile computed by the
FMGS.
This mode is used to fly a NON ILS approach (VOR, VOR/DME, NDB, RNAV..). as inserted
into the flight plan.
V DEV SCALE
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┃I ~-~ A318 ┃ AUTO FLIGHT ┃1.22.30 P 55 ┃
┃ aw aw ,, ~e~ A319 ┃ ┃ ┃
┃ Lli,~ A320 ┃ ┃ ┃
┃ ┃ ┣━━━━┳━━━━┫
┃ A~7-~'M" A321 ┃FLIGHT GUIDANCE ┃SEQ 001 ┃REV 33 ┃
┃ FLIGHT CREW OPERATING MANUAL ┃ ┃ ┃ ┃
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The NON ILS approach includes the following managed modes
APP NAV mode for lateral guidance
FINAL mode for vertical guidance
SELECTION
A NON ILS approach (VOR, VOR/DME, NDB, RNAV) is selected, if the active flight plan calls
for it (and it has been inserted in that flight plan).
ARMING CONDITIONS
The pilot arms the APP NAV and FINAL modes by pressing the APPR pushbutton on the
FCU, if all of the following conditions are met :
- The aircraft is above 400 feet AGL.
- The flight plan is valid (lateral and vertical profile).
- The active flight plan has selected a NON ILS approach.
- GA mode is not engaged.
The FMA displays "FINAL" and "APP NAV" in blue.
If NAV mode was already engaged, APP NAV engages immediately.
DISARMING CONDITIONS
FINAL and NAV modes are disarmed if the pilot :
- Presses the APPR pushbutton, or
- Presses the LOC pushbutton arming the LOC mode, or
- Engages the GO AROUND mode.
ENGAGEMENT CONDITIONS
APP NAV and NAV modes engage under the same conditions :
If NAV mode was engaged, APP NAV engages immediately. If HDG/TRK is engaged, APP
NAV engages when the intercept conditions are met (aircraft track line must intercept the
flight plan active leg).
FINAL mode engages, if :
- APPR phase is active, and the deceleration point has sequenced, and
- APP NAV is engaged, and
- Crosstrack error is less than 1.5 NM, and
- FINAL is armed, and
- The aircraft intercepts a descending leg of the vertical flight path, or
- In V/S (FPA) or OPEN DES, the aircraft intercepts a level-off segment of the vertical
flight profile, with an FCU-selected altitude different from this level-off segment.
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┃ ┃ ┃1.22.30 P 56 ┃
┃ ┃ ┣━━━━━┳━━━━━┫
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本文链接地址：
AIRBUS A320 Flight Crew Operating Manual2(65)
